EP3823193A1 - Verfahren und vorrichtung zur bestimmung der übertragungszeit in einem drahtloskommunikationssystem - Google Patents

Verfahren und vorrichtung zur bestimmung der übertragungszeit in einem drahtloskommunikationssystem Download PDF

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Publication number
EP3823193A1
EP3823193A1 EP19842261.0A EP19842261A EP3823193A1 EP 3823193 A1 EP3823193 A1 EP 3823193A1 EP 19842261 A EP19842261 A EP 19842261A EP 3823193 A1 EP3823193 A1 EP 3823193A1
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EP
European Patent Office
Prior art keywords
signal
harq process
order
harq
transmission timing
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EP19842261.0A
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English (en)
French (fr)
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EP3823193A4 (de
Inventor
Sungjin Park
Younsun Kim
Hyunseok Ryu
Jonghyun BANG
Jeongho Yeo
Jinyoung Oh
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority claimed from PCT/KR2019/009363 external-priority patent/WO2020022850A1/ko
Publication of EP3823193A1 publication Critical patent/EP3823193A1/de
Publication of EP3823193A4 publication Critical patent/EP3823193A4/de
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1848—Time-out mechanisms
    • H04L1/1851—Time-out mechanisms using multiple timers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1628—List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path

Definitions

  • the disclosure relates to a method and apparatus for transmitting or receiving control information and data information in a wireless communication system.
  • the 5G or pre-5G communication systems are also called 'beyond 4G network' communication systems or post long term evolution (LTE) systems.
  • the 5G communication system defined by the 3rd Generation Partnership Project (3GPP) is called a new radio (NR) system.
  • mmWave millimeter wave
  • ACM advanced coding modulation
  • FSK hybrid frequency-shift keying
  • QAM quadrature amplitude modulation
  • SWSC sliding window superposition coding
  • advanced access technologies such as filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) are being developed.
  • FBMC filter bank multi carrier
  • NOMA non-orthogonal multiple access
  • SCMA sparse code multiple access
  • loT Internet of Things
  • M2M machine to machine
  • MTC machine type communication
  • IoT Internet Technology
  • IoT may be applied to a variety of areas, such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart home appliances and advanced medical services through convergence and combination between existing Information Technologies (IT) and various industrial applications.
  • Embodiments of the disclosure may effectively provide services in a wireless communication system.
  • a method of determining transmission timing of a terminal in a wireless communication system includes receiving a first signal from a base station; identifying whether an out-of-order hybrid automatic repeat request (HARQ) process occurs, determining transmission timing of a second signal, which is a response to the first signal, to include a processing time of the out-of-order HARQ process when the out-of-order HARQ process occurs; and transmitting the second signal at the determined transmission timing.
  • HARQ hybrid automatic repeat request
  • a terminal in a wireless communication system includes a transceiver configured to transmit or receive a signal to or from a base station; a memory storing a program and data for determining transmission timing of the terminal; and a processor configured to execute the program stored in the memory to receive a first signal from the base station, identify whether an out-of-order HARQ process occurs, determine transmission timing of a second signal, which is a response to the first signal, to include a processing time of the out-of-order HARQ process when the out-of-order HARQ process occurs, and transmit the second signal at the determined transmission timing.
  • services may be effectively provided in a wireless communication system.
  • a method of determining transmission timing of a terminal in a wireless communication system includes: receiving a first signal from a base station; identifying whether an out-of-order hybrid automatic repeat request (HARQ) process occurs, determining transmission timing of a second signal, which is a response to the first signal, to include a processing time of the out-of-order HARQ process when the out-of-order HARQ process occurs; and transmitting the second signal at the determined transmission timing.
  • HARQ hybrid automatic repeat request
  • the determining of the transmission timing of the second signal, which is the response to the first signal, to include the processing time of the out-of-order HARQ process when the out-of-order HARQ process occurs may include: determining whether a number of out-of-order HARQ processes which the terminal is able to support is exceeded, when the out-of-order HARQ process occurs; and when the number of out-of-order HARQ processes which the terminal is able to support is exceeded, ignoring transmission of the second signal corresponding to the first signal or transmitting invalid information for an HARQ process beyond the number of HARQ processes which the terminal is able to support, and determining transmission timing of the second signal to include a processing time of the out-of-order HARQ process for an HARQ process within the number of HARQ processes which the terminal is able to support.
  • the method may further include: determining transmission timing of the second signal without including a processing time of the out-of-order HARQ process, when the out-of-order HARQ process does not occur; and transmitting the second signal at the determined transmission timing.
  • the determining of the transmission timing of the second signal, which is the response to the first signal, to include the processing time of the out-of-order HARQ process when the out-of-order HARQ process occurs may include determining transmission timing of the second signal to include a processing time of the out-of-order HARQ process when the number of out-of-order processes which the terminal is able to support is not exceeded.
  • the identifying of whether the out-of-order HARQ occurs may include, when a start Orthogonal Frequency Division Multiplexing (OFDM) symbol of the first signal of a second HARQ process is received later than a start OFDM symbol of the first signal of a first HARQ process, and a start OFDM symbol of the second signal of the second HARQ process is transmitted earlier than a start OFDM symbol of the second signal of the second HARQ process, determining that the out-of-order HARQ occurs with respect to the first HARQ process, and the first HARQ process may have an earlier index than the second HARQ process.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the identifying of whether the out-of-order HARQ occurs may include, in comparing the start OFDM symbols of the first signal and the second signal of the first HARQ process with the start OFDM symbols of the first signal and the second signal of the second HARQ process, comparing at least one or more of points in time at which the respective OFDM symbols start and points in time at which the respective OFDM symbols end.
  • the method may further include: determining whether a Downlink Control Information (DCI) format of the first signal of a second HARQ process and a DCI format of the first signal of a first HARQ process are the same; when the DCI format of the first signal of the second HARQ process and the DCI format of the first signal of the first HARQ process are the same, not performing out-of-order HARQ and determining transmission timing of the second signal without including processing time of the out-of-order HARQ process; and transmitting the second signal at the determined transmission timing.
  • DCI Downlink Control Information
  • the method may further include, when the DCI format of the first signal of the second HARQ process and the DCI format of the first signal of the first HARQ process are not same, performing an out-of-order HARQ and determining transmission timing of the second signal to include processing time of the out-of-order HARQ process; and transmitting the second signal at the determined transmission timing.
  • a terminal in a wireless communication system includes: a transceiver configured to transmit or receive a signal to or from a base station; a memory storing a program and data for determining transmission timing of the terminal; and a processor configured to execute the program stored in the memory to receive a first signal from the base station, identify whether an out-of-order HARQ process occurs, determine transmission timing of a second signal, which is a response to the first signal, to include a processing time of the out-of-order HARQ process when the out-of-order HARQ process occurs, and transmit the second signal at the determined transmission timing.
  • the processor may be further configured to determine whether a number of out-of-order HARQ processes which the terminal is able to support is exceeded when the out-of-order HARQ process occurs, and when the number of out-of-order HARQ processes which the terminal is able to support is exceeded, ignore transmission of the second signal corresponding to the first signal or transmitting invalid information for an HARQ process beyond the number of HARQ processes which the terminal is able to support, and determine transmission timing of the second signal to include a processing time of the out-of-order HARQ process for an HARQ process within the number of HARQ processes which the terminal is able to support.
  • the processor may be further configured to determine transmission timing of the second signal without including a processing time of the out-of-order HARQ process, when the out-of-order HARQ process does not occur, and transmit the second signal at the determined transmission timing.
  • the processor may be further configured to determine transmission timing of the second signal to include a processing time of the out-of-order HARQ process when the number of out-of-order processes which the terminal is able to support is not exceeded.
  • the processor may be further configured to, when a start OFDM symbol of the first signal of a second HARQ process is received later than a start OFDM symbol of the first signal of a first HARQ process, and a start OFDM symbol of the second signal of the second HARQ process is transmitted earlier than a start OFDM symbol of the second signal of the second HARQ process, determine that the out-of-order HARQ occurs with respect to the first HARQ process, and the first HARQ process may have an earlier index than the second HARQ process.
  • the processor may be further configured to identify whether the out-of-order HARQ occurs, and in comparing the start OFDM symbols of the first signal and the second signal of the first HARQ process with the start OFDM symbols of the first signal and the second signal of the second HARQ process, compare at least one or more of points in time at which the respective OFDM symbols start and points in time at which the respective OFDM symbols end.
  • the processor may be further configured to determine whether a DCI format of the first signal of a second HARQ process and a DCI format of the first signal of a first HARQ process are the same, when the DCI format of the first signal of the second HARQ process and the DCI format of the first signal of the first HARQ process are the same, not perform out-of-order HARQ and determine transmission timing of the second signal without including processing time of the out-of-order HARQ process, and when the DCI format of the first signal of the second HARQ process and the DCI format of the first signal of the first HARQ process are not same, perform an out-of-order HARQ, determine transmission timing of the second signal to include a processing time of the out-of-order HARQ process, and transmit the second signal at the determined transmission timing.
  • each blocks and combination of the blocks of a flowchart may be performed by computer program instructions.
  • the computer program instructions may be loaded on a processor of a universal computer, a special-purpose computer, or other programmable data processing equipment, and thus they generate means for performing functions described in the block(s) of the flowcharts when executed by the processor of the computer or other programmable data processing equipment.
  • the computer program instructions may also be stored in computer-usable or computer-readable memories oriented for computers or other programmable data processing equipment, so it is possible to manufacture a product that contains instruction means for performing functions described in the block(s) of the flowchart.
  • the computer program instructions may also be loaded on computers or programmable data processing equipment, so it is possible for the instructions to generate a process executed by the computer or the other programmable data processing equipment to provide steps for performing functions described in the block(s) of the flowchart.
  • each block may represent a part of a module, segment, or code including one or more executable instructions to perform particular logic function(s). It is noted that the functions described in the blocks may occur out of order in alternate embodiments. For example, two successive blocks may be performed substantially at the same time or in reverse order.
  • module refers to a software or hardware component, such as field programmable gate array (FPGA) or application specific integrated circuit (ASIC), which performs some functions.
  • the module is not limited to software or hardware.
  • the module may be configured to be stored in an addressable storage medium, or to execute one or more processors.
  • the modules may include components, such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program codes, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays, and variables. Functions served by components and modules may be combined into a less number of components and modules, or further divided into a more number of components and modules.
  • the components and modules may be implemented to execute one or more central processing units (CPUs) in a device or security multimedia card.
  • the module may include one or more processors.
  • Wireless communication systems are evolving from early systems that provide voice-oriented services to broadband wireless communication systems that provide high data rate and high quality packet data services such as 3GPP high speed packet access (HSPA), long term evolution (LTE) or evolved universal terrestrial radio access (E-UTRA), LTE-advanced (LTE-A), 3GPP2 high rate packet data (HRPD), ultra mobile broadband (UMB), and IEEE 802.16e communication standards.
  • HSPA high speed packet access
  • LTE long term evolution
  • E-UTRA evolved universal terrestrial radio access
  • LTE-advanced LTE-A
  • 3GPP2 high rate packet data HRPD
  • UMB ultra mobile broadband
  • the 5G or NR system employs orthogonal frequency division multiplexing schemes for downlink (DL) and uplink (UL).
  • DL downlink
  • UL uplink
  • CP-OFDM cyclic prefix OFDM
  • DFT-S-OFDM discrete Fourier transform spreading OFDM
  • the UL refers to a radio link for a terminal (or user equipment (UE) or mobile station (MS)) to transmit data or a control signal to a base station (BS, or gNode B or eNode B)
  • the DL refers to a radio link for a BS to transmit data or a control signal to a terminal.
  • Such a multiple access scheme allocates and operates time-frequency resources for carrying data or control information for respective users not to overlap each other, i.e., to maintain orthogonality, thereby differentiating each user's data or control information.
  • the 5G or NR system adopts a Hybrid Automatic Repeat request (HARQ) scheme that re-transmits corresponding data through a physical layer in a case that decoding fails at the initial stage of transmission.
  • HARQ Hybrid Automatic Repeat request
  • the receiver transmits information indicating the decoding failure (NACK; Negative Acknowledgment) to a transmitter so that the transmitter may re-transmit the corresponding data through the physical layer.
  • the receiver increases data reception capability by combining the data re-transmitted by the transmitter with the data for which decoding has failed.
  • the receiver may transmit information indicating decoding success (ACK; Acknowledgment) to the transmitter so that the transmitter may transmit new data.
  • ACK decoding success
  • an NR system for new 5G communication is designed to freely multiplex various services in time and frequency resources, so that a waveform/numerology or the like, and a reference signal or the like, may be dynamically or freely allocated as required for the corresponding service.
  • a waveform/numerology or the like, and a reference signal or the like may be dynamically or freely allocated as required for the corresponding service.
  • channel state measurement is essential.
  • a 5G or NR channel has channel and interference properties that significantly change depending on services and is thus required to support a frequency resource group (FRG)-wise subset, which enables division of the measurement.
  • FSG frequency resource group
  • Enhanced Mobile BroadBand eMBB
  • massive Machine Type Communications mMTC
  • Ultra-Reliable and Low-Latency Communications URLLC
  • the eMBB is a service for high rate transmission of high volume data
  • the mMTC is a service for least power consumption at the UE and accesses of multiple UEs
  • the URLLC is a service for high reliability and low latency, without being limited thereto.
  • different requirements may be applied.
  • a first signal may refer to a signal that expects a response from the UE among signals transmitted by a BS to the UE
  • a second signal may refer to a response signal of the UE that has received the first signal.
  • the first signal may be a UL scheduling grant signal and a DL data signal.
  • the second signal may be a UL data signal for UL scheduling grant and an HARQ ACK/NACK for a DL data signal.
  • service types that require the first signal may include eMBB, mMTC, URLCC services, and the like. It is, however, an example, and the service type requiring the first signal in the disclosure is not limited to the aforementioned services.
  • length of a transmission time interval (TTI) of the first signal may refer to length of a period of time in which the first signal is transmitted.
  • length of a TTI of the second signal may refer to length of a period of time in which the second signal is transmitted.
  • second signal transmission timing is information about when a UE transmits the second signal and when a BS receives the second signal, and may be used to have the same meaning as second signal transmission/reception timing.
  • a physical downlink shared channel is a physical channel on which to transmit data, but in the disclosure, the PDSCH may also be called data.
  • higher layer signaling is a method of transferring a signal to the UE from the BS on a DL data channel of the physical layer or to the BS from the UE on a UL data channel of the physical layer, and may also be referred to as RRC signaling or an MAC control element (CE).
  • RRC signaling or an MAC control element (CE).
  • CE MAC control element
  • a base station is an entity for performing resource allocation for a UE, and may be at least one of a gNB, an eNB, a Node B, a BS, a radio access unit, a base station controller (BSC), and a network node.
  • a terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function.
  • DL downlink
  • UL uplink
  • an NR system will be described as an example in the disclosure, it is not limited thereto and embodiments of the disclosure may also be applied to other various communication systems having a similar technical background or channel type. Furthermore, embodiments of the disclosure will also be applied to different communication systems with some modifications to such an extent that does not significantly deviate the scope of the disclosure when judged by skilled people in the art.
  • next generation communication systems In the meantime, as a study on next generation communication systems is being conducted these days, various schemes for scheduling communication with a UE are being discussed. Hence, an efficient scheduling and data transmission/reception scheme in consideration of characteristics of the next generation communication system is required.
  • a plurality of services may be provided for a user, and to provide such a plurality of services for the user, a method of providing the respective services to fit their characteristics in a same time interval and a corresponding apparatus are required.
  • FIG. 1 illustrates a transport structure of the time-frequency domain, which is a radio resource region of a 5G or NR system.
  • the horizontal axis represents the time domain
  • the vertical axis represents the frequency domain.
  • a minimum transmission unit in the time domain is an OFDM symbol
  • N symb OFDM symbols 102 together define a slot 106.
  • a subframe may be defined to be 1.0 ms long
  • a radio frame 114 may be defined to be 10 ms long.
  • a minimum transmission unit in the frequency domain is a subcarrier, and bandwidth of the whole system transmission band may be comprised of a total of N BW subcarriers 104.
  • a basic unit in the time-frequency resource region is a resource element 112 (RE), which may be represented by an OFDM symbol index and a subcarrier index.
  • a resource block (RB) 108 or a physical resource block (PRB) may be defined with N symb successive OFDM symbols 102 in the time domain and N RB successive subcarriers 110 in the frequency domain. Accordingly, one RB 108 may be comprised of includes N symb x N RB REs 112.
  • a minimum transmission unit of data is an RB.
  • DL transmission bandwidth may differ from UL transmission bandwidth.
  • Channel bandwidth refers to RF bandwidth corresponding to the system transmission bandwidth.
  • Table 1 represents correspondence between system transmission bandwidth and channel bandwidth defined in an LTE system for 4G wireless communication before the 5G or NR system. For example, the LTE system having 10MHz channel bandwidth has transmission bandwidth of 50 RBs. [Table 1] Channel bandwidth BW Channel [MHz] 1.4 3 5 10 15 20 Transmission bandwidth configuration NRB 6 15 25 50 75 100
  • the 5G or NR system may be operated in wider channel bandwidth than the channel bandwidth for LTE presented in table 1.
  • Table 2 represents correspondence between system transmission bandwidth, channel bandwidth, and subcarrier spacing (SCS) in the 5G or NR system.
  • SCS subcarrier spacing
  • BW Channel [MHz] 5 10 15 20 25 40 50 60 80 100 Max i mum Transmission bandwidth N RB 15 25 52 79 106 133 216 270 N.A. N.A. N.A. 30 11 24 38 51 65 106 133 162 217 273 60 N.A. 11 18 24 3 1 51 65 79 107 135
  • scheduling information on DL data or UL data is transferred through downlink control information (DCI) from the BS to the UE.
  • DCI downlink control information
  • the DCI may be defined in various formats, and depending on each format, the DCI may indicate whether it is scheduling information (UL grant) for UL data or scheduling information (DL grant) for DL data, whether it is compact DCI with small-sized control information, whether spatial multiplexing is applied using multiple antennas, whether it is DCI for power control, etc.
  • DCI format 1-1 that is scheduling control information for DL data (DL grant) may include one piece of the following control information:
  • time domain resource allocation may be delivered by information about a slot in which a PUSCH is transmitted, a start OFDM symbol position S in the slot, and the number L of OFDM symbols to which the PUSCH is mapped.
  • the S may be a relative position from the beginning of the slot
  • the L may be the number of successive OFDM symbols
  • the S and L may be determined from a start and length indicator value (SLIV) defined as follows:
  • the 5G or NR system may be configured with a table including information about an SLIV value, a PUSCH mapping type, and a slot in which the PUSCH is transmitted in a row commonly through RRC configuration. Subsequently, time domain resource allocation in DCI indicates an index value in the configured table, so that the BS may deliver information about an SLIV value, a PUSCH mapping type, and a slot in which the PUSCH is transmitted to the UE.
  • type A and type B are defined for the PUSCH mapping type.
  • a first OFDM symbol of DMRS OFDM symbols is located in the second or third OFDM symbol in a slot.
  • a first OFDM symbol of DMRS OFDM symbols is located in the first OFDM symbol in a time domain resource allocated in PUSCH transmission.
  • DCI may be transmitted on a physical downlink control channel (PDCCH) (or control information, which is interchangeably used with the PDCCH) after going through channel coding and modulation processes.
  • PDCCH physical downlink control channel
  • DCI is scrambled by a specific radio network temporary identifier (RNTI) separately for each UE, having cyclic redundancy check (CRC) added thereto, channel-coded, and then configured and transmitted in a separate PDCCH.
  • RNTI radio network temporary identifier
  • CRC cyclic redundancy check
  • the PDCCH is mapped and transmitted in a control resource set (CORESET) configured for the UE.
  • CORESET control resource set
  • DL data may be transmitted on a physical downlink shared channel (PDSCH), which is a physical channel for DL data transmission.
  • PDSCH physical downlink shared channel
  • the PDSCH may be transmitted after a control channel transmission interval, and scheduling information such as a specific mapping position in the frequency domain, modulation scheme, etc., is determined based on the DCI transmitted through the PDCCH.
  • the BS notifies the UE of a modulation scheme applied to the PDSCH for transmission and the size of data to be transmitted (transport block size; TBS).
  • an MCS may be comprised of 5 bits or more than or less than 5 bits.
  • the TBS corresponds to the size of a transport block (TB) to be transmitted by the BS before channel coding for error correction is applied to the data.
  • the transport block may include a medium access control (MAC) header, a MAC control element (CE), one or more MAC service data units (MAC SDU), and padding bits.
  • the TB may represent a data unit or a MAC protocol data unit (MAC PDU) sent down to the physical layer from the MAC layer.
  • the 5G or NR system supports the following modulation schemes: QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), 64QAM, and 256QAM, and their respective modulation orders Qm are 2, 4, 6, and 8. For example, two bits per symbol may be transmitted for QPSK modulation, 4 bits per OFDM symbol for 16QAM modulation, 6 bits per symbol for 64QAM modulation, and 8 bits per symbol for 256QAM modulation.
  • QPSK Quadrature Phase Shift Keying
  • 16QAM Quadrature Amplitude Modulation
  • 64QAM Quadrature Amplitude Modulation
  • 256QAM modulation orders
  • two bits per symbol may be transmitted for QPSK modulation, 4 bits per OFDM symbol for 16QAM modulation, 6 bits per symbol for 64QAM modulation, and 8 bits per symbol for 256QAM modulation.
  • FIG. 2 is a diagram for describing a method of allocating data for eMBB, URLLC, and mMTC in time-frequency resource region in a 5G or NR system.
  • data for eMBB, URLLC, and mMTC may be allocated in a whole system frequency band 200.
  • URLLC data 203 205, and 207 occurs and needs to be transmitted while eMBB 201 and mMTC 209 are allocated and being transmitted in a particular frequency band
  • the URLLC data 203, 205, and 207 may be transmitted without emptying or transmitting a part already allocated the eMBB 201 and the mMTC 209.
  • URLLC requires reduction in latency, so that the URLLC data may be allocated and transmitted in a portion of a resource allocated the eMBB or mMTC.
  • the eMBB data may not be transmitted in the overlapping time-frequency resource, and accordingly, transmission performance for the eMBB data may be reduced. In other words, eMBB data transmission failure may occur due to the URLLC allocation.
  • FIG. 3 is a diagram for describing processing time of a UE based on timing advance, when the UE receives a first signal and in response, transmits a second signal in a 5G or NR system.
  • the UE when a UE receives a first signal in slot n 304, the UE transmits a second signal corresponding to the first signal in slot n+4 306.
  • the BS transmits the first signal in the slot n 302
  • the BS receives the second signal corresponding to the first signal in the slot n+4 308.
  • the BS transmits UL scheduling grant, a DL control signal, or DL data to the UE in the slot n 302
  • the UE may receive the UL scheduling grant, the DL control signal, or DL data transmitted by the BS in the slot n 304.
  • the reception at the UE may be delayed by T P , which is propagation delay 310, from the transmission time at the BS.
  • T P propagation delay 310
  • the UE may transmit UL data or HARA ACK/NACK for DL data at a time advanced by timing advance T A 312 from the slot n+4 based on the signal received by the UE in order to make the signal arrive at the BS at a particular time.
  • UE processing time 314 for the UE to prepare to transmit UL data after receiving UL scheduling grant or deliver HARQ ACK or NACK after receiving DL data may be a period of time corresponding to three slots except for T A .
  • the BS may calculate an absolute value of T A of the corresponding UE.
  • the BS may calculate the absolute value of T A by adding to or subtracting from a T A value delivered to the UE for the first time in a random access process an amount of change in the T A value subsequently delivered by higher signaling.
  • the absolute value of T A may be a value 312 resulting from subtracting a start time of the n'th TTI received by the UE from a start time of the n'th TTI transmitted by the UE.
  • a signal is transmitted or received in the unit of a subframe having a transmission time interval (TTI) of 1ms.
  • TTI transmission time interval
  • the LTE system may support a UE having a TTI shorter than 1ms (short-TTI UE).
  • short-TTI UE may be shorter than 1ms.
  • the short-TTI UE is suitable for services such as a voice over LTE VoLTE) service for which latency is important or a remote control service.
  • the short-TTI UE is also a means for substantializing cellular based mission-critical Internet of Things.
  • DCI that schedules the PDSCH indicates a K 1 value corresponding to timing information at which the UE transmits HARQ-ACK information for the PDSCH.
  • the UE may transmit the HARQ-ACK information to the BS.
  • the HARQ-ACK information may be transmitted from the UE to the BS at the same timing as or later than the OFDM symbol L 1 .
  • the HARQ-ACK information with the timing advance included may not be valid HARQ-ACK information in the HARQ-ACK transmission from the UE to the BS.
  • the OFDM symbol L 1 may be the first OFDM symbol in which cycle prefix (CP) starts after T proc,1 from the last time of the last OFDM symbol of the PDSCH.
  • N 1 , d 1,1 , d 1,2 , ⁇ , ⁇ , and T C may be defined as follows:
  • ⁇ PDCCH refers to subcarrier spacing (SCS) applied to PDCCH scheduling.
  • SCS subcarrier spacing
  • ⁇ PDCCH refers to SCS applied to a scheduled PDSCH.
  • ⁇ UL refers to SCS of a UL channel on which HARQ-ACK is transmitted.
  • a maximum timing difference between carriers may be reflected in transmission of the second signal.
  • - N 1 is defined according to ⁇ as in the following Table 3 or Table 4.
  • Table 3 represents PDSCH processing time for PDSCH processing capability 1
  • Table 4 represents PDSCH processing time for PDSCH processing capability 2.
  • the UE when the BS transmits control information including UL scheduling grant, the UE may indicate a value of K 2 corresponding to information of timing at which the UE transmits UL data or a PUSCH.
  • the UE may transmit the PUSCH to the BS.
  • the PUSCH may be transmitted from the UE to the BS at the same timing as or later than the OFDM symbol L 2 .
  • the UE may discard the UL scheduling grant control information from the BS.
  • the OFDM symbol L 2 may be the first OFDM symbol in which cycle prefix (CP) of a PUSCH OFDM symbol to be transmitted starts after T proc,2 from the last time of the last OFDM symbol of the PDCCH including the scheduling grant.
  • ⁇ DL refers to SCS with which a PDSCH including DCI that schedules a PUSCH is transmitted.
  • ⁇ UL refers to SCS of a UL channel on which the PUSCH is transmitted.
  • N 2 is defined according to ⁇ as in the following Table 5 or Table 6.
  • Table 5 represents PUSCH preparation time for UE processing capability 1
  • Table 6 represents PUSCH preparation time for UE processing capability 2.
  • ⁇ PUSCH preparation time N 2 [symbols] 0 10 1 12 2 23 3 23
  • ⁇ PUSCH preparation time N 2 [symbols] 0 3 1 4.5 2 9 for FRI - the aforementioned value of N 2 may be used with Table 5 or Table 6 according to UE capability.
  • FIG. 4 is a diagram for describing processing of a UE based on occurrence of multiple HARQ processes, when the UE receives a first signal and in response, transmits a second signal in a 5G or NR system, according to an embodiment of the disclosure.
  • a first signal 404 is transmitted and received by a BS and a UE, respectively, and a corresponding second signal 406 is transmitted and received by the UE and the BS, respectively.
  • a time gap 412 between the first signal 404 and the second signal 406 is equal to or greater than T proc,1 (or T proc,2 )
  • the second signal is transmitted. Otherwise, the UE may ignore transmission of the second signal or perform transmission of an invalid second signal.
  • a first signal 408 is transmitted and received by the BS and the UE, respectively, and a corresponding second signal 410 is transmitted and received by the UE and the BS, respectively.
  • a time gap 414 between the first signal 408 and the second signal 410 is equal to or greater than T proc,1 (or T proc,2 )
  • the second signal is transmitted. Otherwise, the UE may ignore transmission of the second signal or perform transmission of the invalid second signal.
  • UE processing for transmitting or receiving the first signal and the second signal of the n'th and k'th HARQ processes in a UE processor 420 is required.
  • the UE processor required when the first signal is DL data information and the second signal is HARQ-ACK information may be configured with channel estimation, demodulation, decoding, and HARQ-ACK preparation blocks.
  • the UE performs channel estimation 422, demodulation 424, decoding 426, and HARQ-ACK preparation 428 processes to process the first signal 404 and the corresponding second signal 406 in the n'th HARQ process.
  • the UE performs channel estimation 430, demodulation 432, decoding 434, and HARQ-ACK preparation 436 processes to process the first signal 408 and the corresponding second signal 410 of the k'th HARQ process.
  • the UE basically processes the first signal and the corresponding second signal in multiple HARQ processes through pipeline operation.
  • the respective blocks that form the UE processor may operate in parallel for each HARQ process, as shown in FIG. 4 .
  • channel estimation or demodulation, decoding, or HARQ ACK preparation
  • channel estimation or demodulation, decoding, or HARQ ACK preparation
  • the UE may support multiple HARQ processes while using fewer resources (e.g., the number or capabilities of blocks constituting the processor) through the pipeline operation.
  • FIG. 5 is a diagram for describing processing time of a UE based on an occurrence of out-of-order HARQ, when the UE receives a first signal and in response, transmits a second signal in a 5G or NR system, according to an embodiment of the disclosure.
  • a first signal 504 is transmitted and received by a BS and a UE, respectively, in an n'th HARQ process 500, and a corresponding second signal 506 is transmitted and received by the UE and the BS, respectively.
  • a time gap 512 between the first signal 504 and the second signal 506 is equal to or greater than T proc,1 (or T proc,2 )
  • the second signal is transmitted. Otherwise, the UE may ignore transmission of the second signal or perform transmission of the invalid second signal.
  • a first signal 508 is transmitted and received by the BS and the UE, respectively, and a corresponding second signal 510 is transmitted and received by the UE and the BS, respectively.
  • a time gap 514 between the first signal 508 and the second signal 510 is equal to or greater than T proc,1 (or T proc,2 )
  • the second signal is transmitted. Otherwise, the UE may ignore transmission of the second signal or perform transmission of the invalid second signal.
  • the operation of processing the first signal 504 and the second signal 506 of the n'th HARQ process 500 is affected by processing of the first signal 508 and the second signal 510 of the k'th HARQ process 502.
  • the UE when the first signal is DL data information and the second signal is HARQ-ACK information for the DL data, the UE performs a series of pipeline operations such as estimating a DL data channel, performing demodulation and decoding based on the estimated channel value, preparing control information for HARQ-ACK transmission, etc., to report HARQ-ACK for results of DL data reception and decoding of the data to the BS.
  • the first signal 508 of the k'th HARQ process 502 is received by the UE later in time than the first signal 504 of the n'th HARQ process 500, but the second signal 510 of the k'th HARQ process 502 needs to be transmitted by the UE earlier in time than the second signal 506 of the n'th HARQ process 500.
  • the UE needs to give priority to processing of the first signal and the corresponding second signal of the k'th HARQ process, which have been received later in time.
  • a situation may occur where the UE needs to take priority on processing of the first signal and second signal of the k'th HARQ process over processing of the first signal and second signal of the n'th HARQ process.
  • a situation may occur where the UE performs channel estimation for the first signal 504 of the n'th HARQ process 500 earlier than channel estimation for the first signal 508 of the k'th HARQ process 502, but after this, needs to handle demodulation, decoding, and HARQ ACK later.
  • the k'th HARQ process may be the out-of-order HARQ from the perspective of the n'th HARQ process.
  • a start OFDM symbol of the first signal of the k'th HARQ process is transmitted or received later than a start OFDM symbol of the first signal of the n'th HARQ process
  • a start OFDM symbol of the second signal of the k'th HARQ process is transmitted or received earlier than a start OFDM symbol of the second signal of the n'th HARQ process
  • whether an OFDM symbol is transmitted or received earlier or later may be determined by comparing times at which OFDM symbols start to be received, times at which the reception is completed, etc. For example, which OFDM symbol is received later may be determined by comparing a time at which the start OFDM symbol of the first signal of the n'th HARQ process is started with a time at which the start OFDM symbol of the first signal of the k'th HARQ process is started. Also, which OFDM symbol is received later may also be determined by comparing a time at which the start OFDM symbol of the first signal of the n'th HARQ process is ended with a time at which the start OFDM symbol of the first signal of the k'th HARQ process is ended.
  • which OFDM symbol is received later may be determined by comparing a time at which the start OFDM symbol of the first signal of the n'th HARQ process is started with a time at which the start OFDM symbol of the first signal of the n'th HARQ process is ended or comparing a time at which the start OFDM symbol of the first signal of the n'th HARQ process is ended with a time at which the start OFDM symbol of the first signal of the n'th HARQ process is started.
  • both the time at which the OFDM symbol starts to be received and the time at which the reception is completed may be considered, or determination may be made by considering both the time at which reception starts and the time at which the reception is completed in one HARQ process and considering one of the time at which reception starts and the time at which the reception is completed in the other HARQ process.
  • the k'th HARQ process 502 may be the out-of-order HARQ from the perspective of the n'th HARQ process 500.
  • a processing time required for processing the first signal 504 and the corresponding second signal 506 of the n'th HARQ process 500 with the presence of the out-of-order HARQ is likely to differ from a processing time required for processing the first signal 504 and the corresponding second signal 506 of the n'th HARQ process 500 without the presence of the out-of-order HARQ, in which case, the former processing time may be generally equal to or greater than the latter processing time.
  • the BS and the UE need to consider T proc,1 (or T proc,2 ) by reflecting the out-of-order HARQ. This will now be described in more detail in connection with FIGS. 6 to 8 .
  • FIG. 6 is a flowchart illustrating operation of a UE based on an occurrence of out-of-order HARQ, when the UE receives a first signal and in response, transmits a second signal in a 5G or NR system, according to an embodiment of the disclosure.
  • a process in which a BS and a UE use an out-of-order HARQ to determine a processing time is included.
  • the BS and the UE respectively transmit and receive the first signal in operation 602
  • whether an out-of-order HARQ process from the perspective of an HARQ process including the first signal occurs is identified in operation 604.
  • a minimum processing time without including compensation time for the out-of-order HARQ process is calculated, in operation 608.
  • the out-of-order HARQ process when the out-of-order HARQ process occurs, calculation is performed by including compensation time for the out-of-order HARQ process, in operation 606.
  • the minimum processing time may refer to the earliest time at which to transmit the second signal.
  • calculation including the compensation time may refer to calculation by taking into account the added number of HARQ processes, increased time due to the out-of-order HARQ process and adding an already determined OFDM symbol or the increased time.
  • the UE may calculate the processing time T proc,1 using the following equation 3 or equation 4 instead of the equation 1.
  • T proc , 1 N 1 + d 1,1 + d 1,2 + d 1,3 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C
  • T proc , 1 N 1 + d 1,1 + d 1,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C + d 1,3
  • d 1,3 refers to a compensation time for the occurrence of out-of-order HARQ.
  • d 1,3 is an OFDM symbol unit for the SCS ⁇
  • d 1,3 is an absolute time value in the equation 4.
  • d 1,3 may be configured with one, two or more combinations of the followings:
  • d 1,3 may have a value defined to be greater than 0 when the out-of-order HARQ occurs, and d 1,3 may be 0 without an occurrence of out-of-order HARQ.
  • d 1,3 may have the largest value, or use a value predefined in a standard, or may be preset in higher signaling.
  • d 1,3 may be defined as in the following Table 7.
  • Table 7 represents values of d 1,3 according to the number of out-of-order HARQ processes in an embodiment.
  • [Table 7] Out-of-order HARQ Process Count 1 2 3 ... ... d 1.3
  • [0FDM symbol unit or time unit] a b c ... ... where a, b, c,... may be preset values.
  • a, b, c,... are different letters used for convenience, they may have the same value.
  • the UE may perform adaptive HARQ-ACK information transmission using the value of T proc,1 calculated through the equation 3 or equation 4. Unless the HARQ-ACK information with timing advance included is indicated to be transmitted earlier than OFDM symbol L 1 , the UE may transmit the HARQ-ACK information to the BS. In other words, with the timing advance included, the HARQ-ACK information may be transmitted from the UE to the BS at the same timing as or later than the OFDM symbol L 1 . When the HARQ-ACK information with the timing advance included is indicated to be transmitted earlier than the OFDM symbol L 1 , the HARQ-ACK information may not be valid HARQ-ACK information in the HARQ-ACK transmission from the UE to the BS.
  • the UE may not perform HARQ-ACK transmission to the BS or may transmit NACK information.
  • the OFDM symbol L 1 may be the first OFDM symbol in which cycle prefix (CP) starts after T proc,1 from the last time of the last OFDM symbol of the PDSCH.
  • a calculation formula of the processing time T proc,1 may be selected by the following [pseudo code 1] or [pseudo code 2] according to whether the out-of-order HARQ occurs.
  • T proc , 1 N 1 + d 1,1 + d 1,2 + d 1,3 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C
  • T proc , 1 N 1 + d 1,1 + d 1,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C
  • T proc , 1 N 1 + d 1,1 + d 1,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C + d 1,3
  • T proc , 1 N 1 + d 1,1 + d 1,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C
  • whether to accept the occurrence of out-of-order HARQ may be configured by higher signaling, and a calculation formula of the processing time T proc,1 may be selected by the following [pseudo code 3] or [pseudo code 4].
  • T proc , 1 N 1 + d 1,1 + d 1,2 + d 1,3 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C
  • T proc , 1 N 1 + d 1,1 + d 1,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C
  • T proc , 1 N 1 + d 1,1 + d 1,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C + d 1,3
  • T proc , 1 N 1 + d 1,1 + d 1,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C
  • the UE may calculate the processing time T proc,2 using the following equation 5 or equation 6 instead of the equation 2.
  • T proc , 2 max N 2 + d 2,1 + d 2,2 + d 2,4 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C , d 2,3
  • T proc , 2 max N 2 + d 2,1 + d 2,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C + d 2,4 , d 2,3
  • d 2,4 refers to a compensation time for the occurrence of out-of-order HARQ.
  • d 2,4 is an OFDM symbol unit for the SCS ⁇
  • d 2,4 is an absolute time value in the equation 6.
  • d 2,4 may be configured with one, two or more combinations of the followings:
  • d 2,4 may have a value defined to be greater than 0 when the out-of-order HARQ occurs, and d 2,4 may be 0 without an occurrence of out-of-order HARQ.
  • d 2,4 may have the largest value, or use a value predefined in a standard, or may be preset in higher signaling.
  • d 2,4 may be defined as in the following Table 8.
  • Table 8 represents values of d 2,4 according to the number of out-of-order HARQ processes in an embodiment.
  • [OFDM symbol unit or time unit ] a b c ... ... where a, b, c,... may be preset values.
  • a, b, c,... are different letters used for convenience, they may have the same value.
  • the UE may perform adaptive PUSCH transmission using the value of T proc,2 calculated through the equation 5 or equation 6. Specifically, unless the PUSCH with timing advance included is indicated to be transmitted earlier than OFDM symbol L 2 , the UE may transmit the PUSCH to the BS. In other words, with the timing advance included, the PUSCH may be transmitted from the UE to the BS at the same timing as or later than the OFDM symbol L 2 . When the PUSCH with timing advance included is indicated to be transmitted earlier than OFDM symbol L 2 , the UE may ignore the UL scheduling grant control information from the BS.
  • the OFDM symbol L 2 may be the first OFDM symbol in which cycle prefix (CP) of a PUSCH OFDM symbol to be transmitted starts after T proc,2 from the last time of the last OFDM symbol of the PDCCH including the scheduling grant.
  • CP cycle prefix
  • a calculation formula of the processing time T proc,2 may be selected by the following [pseudo code 5] or [pseudo code 6] according to whether an out-of-order HARQ occurs.
  • T proc , 2 max N 2 + d 2,1 + d 2,2 + d 2,4 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C , d 2,3
  • T proc , 2 max N 2 + d 2,1 + d 2,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C , d 2,3
  • T proc , 2 max N 2 + d 2,1 + d 2,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C + d 2,4 , d 2,3
  • T proc , 2 max N 2 + d 2,1 + d 2,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C , d 2,3
  • whether to accept the occurrence of out-of-order HARQ may be configured by higher signaling, and a calculation formula of the processing time T proc,2 may be selected by the following [pseudo code 7] or [pseudo code 8].
  • T proc , 2 max N 2 + d 2,1 + d 2,2 + d 2,4 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C , d 2,3
  • T proc , 2 max N 2 + d 2,1 + d 2,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C , d 2,3
  • T proc , 2 max N 2 + d 2,1 + d 2,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C + d 2,4 , d 2,3
  • T proc , 2 max N 2 + d 2,1 + d 2,2 2048 + 144 ⁇ ⁇ 2 ⁇ ⁇ ⁇ T C , d 2,3
  • FIG. 7 is a flowchart illustrating operation of a UE based on the number of out-of-order HARQ processes that the UE is able to support, when the UE receives a first signal and in response, transmits a second signal in a 5G or NR system, according to an embodiment of the disclosure.
  • a UE receives a first signal, in operation 702.
  • the UE determines whether out-of-order HARQs occur beyond the number of out-of-order HARQ processes that the UE is able to support, in operation 804.
  • the definition as described above in connection with FIG. 5 is applied to a condition for determining an occurrence of out-of-order HARQ.
  • the number of out-of-order HARQ processes that the UE is able to support may be reported in UE capability to the BS in advance, or may be configured separately from the BS through higher signaling within the number of out-of-order HARQ processes that the UE is able to support.
  • the UE may ignore transmission of the second signal corresponding to the first signal or transmit invalid information, in operation 708.
  • the UE transmits ACK or NACK, but the invalid information may refer to the ACK or NACK being invalid.
  • the UE may ignore transmission of the second signal corresponding to the first signal or transmit invalid information for the first HARQ process or the last HARQ process that has influence on the out-of-order HARQ process.
  • the UE transmits the second signal corresponding to the first signal based on the equation 1 or equation 2, in operation 710.
  • FIG. 8 is a flowchart illustrating operation of a UE based on an occurrence of out-of-order HARQ and the number of out-of-order HARQ processes that the UE is able to support, when the UE receives a first signal and in response, transmits a second signal in a 5G or NR system, according to an embodiment of the disclosure.
  • a UE receives a first signal, in operation 802. Subsequently, whether an out-of-order HARQ for the first signal occurs before transmission of a second signal corresponding to the first signal is determined, in operation 804. In this case, the definition as described above in connection with FIG. 5 is applied to a condition for determining an occurrence of out-of-order HARQ.
  • the UE transmits the second signal in response to reception of the first signal without considering the out-of-order HARQ. Specifically, the UE determines whether to transmit the second signal in response to reception of the first signal based on the processing time expressed in the equation 1 or equation 2.
  • the UE calculates the processing time based on the equation 1
  • the UE calculates the processing time based on the equation 2.
  • the UE compares the number of out-or-order HARQ processes that the UE is able to support with the number of out-of-order HARQ processes that have actually occurred, in operation 808.
  • the UE transmits the second signal in response to reception of the first signal by considering the out-of-order HARQ, in operation 810. Specifically, the UE determines whether to transmit the second signal in response to reception of the first signal based on the processing time expressed in the equation 1, equation 2, equation 3, equation 4, equation 5, or equation 6.
  • the UE calculates the processing time based on the equation 1, equation 3, or equation 4, and on the other hand, when the first signal is UL grant DCI and the second signal is UL data, the UE calculates the processing time based on the equation 2, equation 5, or equation 6.
  • a variable d 1,3 defined in the equation 3 or equation 4 may further reflect the number of out-of-order HARQ processes that the UE is able to support in addition to the aforementioned conditions of FIG. 6 .
  • d 1,3 when the number of out-of-order HARQ occurrences is greater than the number of out-of-order HARQ processes that the UE is able to support, d 1,3 may have a value defined to be greater than 0, or otherwise, d 1,3 may be 0.
  • a variable d 2,4 defined in the equation 5 or equation 6 may further reflect the number of out-of-order HARQ processes that the UE is able to support in addition to the aforementioned conditions of FIG. 6 .
  • d 2,4 may have a value defined to be greater than 0, or otherwise, d 2,4 may be 0.
  • the UE may ignore transmission of the second signal corresponding to the first signal or transmit invalid information, in operation 812. Specifically, the UE may ignore transmission of the second signal corresponding to the first signal or transmit invalid information for an HARQ process beyond the number of HARQ processes that the UE is able to support, and for an HARQ process within the number of HARQ processes that the UE is able to support, transmit the second signal by considering the out-of-order HARQ.
  • the UE transmits ACK or NACK, but the invalid information may refer to e.g., the ACK or NACK being invalid.
  • the UE determines whether to transmit the second signal in response to reception of the first signal based on the processing time expressed in the equation 1, equation 2, equation 3, equation 4, equation 5, or equation 6.
  • a variable d 1,3 defined in the equation 3 or equation 4 may further reflect the number of out-of-order HARQ processes that the UE is able to support in addition to the aforementioned conditions of FIG. 6 .
  • d 1,3 when the number of out-of-order HARQ occurrences is greater than the number of out-of-order HARQ processes that the UE is able to support, d 1,3 may have a value defined to be greater than 0, or otherwise, d 1,3 may be 0.
  • a variable d 2,4 defined in the equation 5 or equation 6 may further reflect the number of out-of-order HARQ processes that the UE is able to support in addition to the aforementioned conditions of FIG. 6 .
  • d 2,4 when the number of out-of-order HARQ occurrences is greater than the number of out-of-order HARQ processes that the UE is able to support, d 2,4 may have a value defined to be greater than 0, or otherwise, d 2,4 may be 0.
  • the UE may not expect to be scheduled in an out-of-order HARQ operation scheduled beyond the number of out-of-order HARQ processes that the UE is able to support. Specifically, on an occasion when the number of out-of-order HARQ processes that the UE is able to support is 2, the UE does not expect to be scheduled from the BS to have the number of out-of-order HARQ processes that actually occur be 3 or more. For extra out-of-order HARQ scheduling, the UE may ignore transmission of the second signal or transmit an invalid value.
  • d 1,3 included in the equation 3 to equation 4 may be used by applying the following table 9.
  • Table 9 represents values of d 1,3 according to the number of out-of-order HARQ processes and the number of out-of-order HARQ processes that the UE is able to support.
  • [Table 9] Number of out-of-order HARQ processes that have occurred - Number of out-of-order HARQ processes that UE is able to support 1 2 3 ... ... d1,3
  • a, b, c,... are different letters used for convenience, they may have the same value.
  • d 2,4 included in the equation 5 to equation 6 may be used by applying the following table 10.
  • Table 10 represents values of d 2,4 according to the number of out-of-order HARQ processes and the number of out-of-order HARQ processes that the UE is able to support.
  • [Table 10] Number of out-of-order HARQ processes that have occurred - Number of out-of-order HARQ processes that UE is able to support 1 2 3 ... ... d 2,4
  • a, b, c,... are different letters used for convenience, they may have the same value.
  • FIG. 9 is a flowchart illustrating a method by which a UE determines transmission timing of a second signal when the UE receives a first signal and in response, transmits the second signal in a 5G or NR system, according to an embodiment of the disclosure.
  • a process in which a BS and a UE use the number of out-of-order HARQ processes to determine a processing time is included.
  • a processing time is calculated according to the number of out-of-order HARQ processes from the perspective of an HARQ process including the first signal in operation 904.
  • the UE determines the processing time and transmits the second signal, in operation 906. This will be described in more detail below.
  • DCI that schedules the PDSCH indicates a K 1 value corresponding to timing information at which the UE transmits HARQ-ACK information for the PDSCH.
  • the UE may transmit the HARQ-ACK information to the BS.
  • the HARQ-ACK information may be transmitted from the UE to the BS at the same timing as or later than the OFDM symbol L 1 .
  • the HARQ-ACK information with the timing advance included may not be valid HARQ-ACK information in the HARQ-ACK transmission from the UE to the BS.
  • the OFDM symbol L 1 may be the first OFDM symbol in which cycle prefix (CP) starts after T proc,1 from the last time of the last OFDM symbol of the PDSCH.
  • N 1 , d 1,1 , d 1,2 , K, ⁇ , and T C may be defined as follows:
  • Out-of-order HARQ related values presented in Table 11 and Table 12 are only an example without being limited thereto, and other values may be used or configured by other tables with similar concepts. For example, there may be a separate table for determining the transmission time for each number of out-of-order HARQ processes.
  • the UE when the BS transmits control information including UL scheduling grant, the UE may indicate a value of K 2 corresponding to information of timing at which the UE transmits UL data or a PUSCH.
  • the UE may transmit the PUSCH to the BS.
  • the PUSCH may be transmitted from the UE to the BS at the same timing as or later than the OFDM symbol L 2 .
  • the UE may discard the UL scheduling grant control information from the BS.
  • the OFDM symbol L 2 may be the first OFDM symbol in which cycle prefix (CP) of a PUSCH OFDM symbol to be transmitted starts after T proc,2 from the last time of the last OFDM symbol of the PDCCH including the scheduling grant.
  • N 2 , d 2,1 , d 2,2 , d 2,3 , ⁇ , ⁇ , and T C may be defined as follows:
  • Out-of-order HARQ related values presented in Table 13 and Table 14 are only an example, and other values may be used or configured by other tables with similar concepts. For example, there may be a separate table for determining the transmission time for each number of out-of-order HARQ processes.
  • FIG. 10 is a diagram illustrating a procedure for configuring a processing time type of a UE based on content of a capability report of the UE in a 5G or NR system, according to an embodiment of the disclosure.
  • a UE reports UE capability to a BS, in operation 1002.
  • a value of the variable N 1 in T proc,1 is defined in Table 4, and the UE uses the value to determine a processing time in operation 1008.
  • a value of the variable N 1 in T proc,1 is defined in Table 3, and the UE uses the value to determine a processing time in operation 1006.
  • PUSCH timing capability 2 when PUSCH timing capability 2 is included in the capabilities reported by the UE in operation 1004, a value of the variable N 2 in T proc,2 is defined in Table 6, and the UE uses the value to determine a processing time in operation 1008.
  • a value of the variable N 2 in T proc,2 is defined in Table 5, and the UE uses the value to determine a processing time in operation 1006.
  • FIG. 11 illustrates a procedure for configuring a processing time type of a UE based on content of a capability report of the UE in a 5G or NR system, according to another embodiment of the disclosure.
  • a UE reports UE capability to a BS, in operation 1102.
  • a value of the variable N 1 in T proc,1 is defined by one of Table 3 or table 4 selected by higher signaling or L1 signaling, and the UE uses the value to determine a processing time in operation 1108.
  • the UE may use Table 4 to determine the value of the variable N 1 in the processing time T proc,1 for separately scheduled first signal and corresponding second signal.
  • the UE may use Table 3 to determine the value of the variable N 1 in the processing time T proc,1 for separately scheduled first signal and corresponding second signal.
  • the L1 signaling may have a DCI format or a radio network temporary identifier (RNTI), and the UE may determine whether the value of the variable N 1 in the processing time T proc,1 uses Table 4 or Table 5 according to the detected DCI format.
  • DCI format 1_0 when scheduled with fallback DCI (DCI format 1_0), the UE may use Table 4 to determine the value of the variable N 1 in the processing time T proc,1 for the scheduled first signal and corresponding second signal
  • DCI for URLLC e.g., DCI format 3_x having a size smaller than the fallback DCI
  • the UE may use Table 5 to determine the value of the variable N 1 in the processing time T proc,1 for the scheduled first signal and corresponding second signal.
  • the UE when scheduled with a DCI format including CRC scrambled by a C-RNTI, a CS-RNTI, or an RA-RNTI, the UE may use Table 4 to determine the value of the variable N 1 in the processing time T proc,1 for the scheduled first signal and corresponding second signal.
  • the UE may use Table 5 to determine the value of the variable N 1 in the processing time T proc,1 for the scheduled first signal and corresponding second signal.
  • a value of the variable N 1 in T proc,1 is defined in Table 3, and the UE uses the value to determine a processing time in operation 1106.
  • a UE reports UE capability to a BS, in operation 1102.
  • a value of the variable N 2 in T proc,2 is defined by one of Table 5 or table 6 selected by higher signaling or L1 signaling, and the UE uses the value to determine a processing time in operation 1108.
  • the UE may use Table 6 to determine the value of the variable N 2 in the processing time T proc,2 for separately scheduled first signal and corresponding second signal.
  • the UE may use Table 5 to determine the value of the variable N 2 in the processing time T proc,2 for separately scheduled first signal and corresponding second signal.
  • the L1 signaling may have a DCI format or a radio network temporary identifier (RNTI), and the UE may determine whether the value of the variable N 2 in the processing time T proc,2 uses Table 5 or Table 6 according to the detected DCI format.
  • DCI format 0_0 when scheduled with fallback DCI (DCI format 0_0), the UE may use Table 5 to determine the value of the variable N 1 in the processing time T proc,1 for the scheduled first signal and corresponding second signal
  • DCI for URLLC e.g., DCI format 3_x having a size smaller than the fallback DCI
  • the UE may use Table 6 to determine the value of the variable N 2 in the processing time T proc,2 for the scheduled first signal and corresponding second signal.
  • the UE may use Table 6 to determine the value of the variable N 2 in the processing time T proc,2 for the scheduled first signal and corresponding second signal.
  • the UE may use Table 6 to determine the value of the variable N 2 in the processing time T proc,2 for the scheduled first signal and corresponding second signal.
  • a value of the variable N 2 in T proc,2 is defined in Table 6, and the UE uses the value to determine a processing time in operation 1106.
  • FIG. 12 is a diagram for describing a condition in which out-of-order HARQ scheduling for a UE occurs in a 5G or NR system, according to another embodiment of the disclosure.
  • a UE receives a first signal, in operation 1202. After receiving the first signal, the UE detects DCI before transmitting a second signal corresponding to the first signal, and determines whether the DCI has the same DCI format as previous DCI, in operation 1204. When the DCI format of the corresponding DCI is the same as the previous DCI format or is detected by the same RNTI, the UE may determine that an HARQ indicated in the DCI does not accept an out-of-order HARQ, in operation 1206. When the DCI format is different from the previous DCI format or is detected by a different RNTI, the UE may determine that the HARQ indicated in the DCI accepts an out-of-order HARQ, in operation 1208.
  • having the same DCI format means that the DCI is detected in the same search space.
  • the same search space may be a search space having the same index, or may be classified as UE-common search or UE-specific search space. For example, even with different indexes, all the DCI detected in the UE-common search space may be determined as having the same DCI format.
  • the UE may receive a PDSCH in an i'th slot, transmit HARQ-ACK for the PDSCH in a j'th slot, receive another PDSCH in a slot after the i'th slot, and determine not to transmit HARQ-ACK for the other PDSCH in a slot before the j'th slot.
  • the UE may receive a PDSCH in an i'th OFDM symbol, transmit HARQ-ACK for the PDSCH in a j'th OFDM symbol, receive another PDSCH in an OFDM symbol after the i'th OFDM symbol, and determine not to transmit HARQ-ACK for the other PDSCH in an OFDM symbol before the j'th OFDM symbol.
  • the UE may receive UL grant in an i'th OFDM symbol, transmit an PUSCH for the UL grant in a j'th OFDM symbol, receive another UL grant in an OFDM symbol after the i'th OFDM symbol, and determine not to transmit a PUSCH for the other UL grant in an OFDM symbol before the j'th OFDM symbol.
  • FIG. 13 illustrates a method of processing a second signal in a situation where first signals have overlapping scheduling.
  • a UE receives DL control information 1302 and 1304 that schedules first signals 1306 and 1308.
  • the first signal may correspond to data information to be transmitted in DL, a reference signal for channel estimation, or the like.
  • the DL control information refers to information transmitted on a DL control channel (PDCCH).
  • PDCCH DL control channel
  • the UE may be scheduled with the other first signal 1308 in the other DL control information 1304.
  • the reason that the BS is able to make this scheduling is that the first signal 1306 may be an eMBB related signal and the other first signal 1308 may be a URLLC related signal.
  • the URLLC related signal requires higher reliability and lower latency than the eMBB, it is possible for the BS to schedule the URLLC earlier than the eMBB when the URLLC related traffic occurs even after the BS schedules the first signal 1306 first.
  • the BS may schedule the other first signal 1308 in a region at least partially overlapping a time resource region of the scheduled first signal 1306.
  • the UE may receive only the first signal 1308 scheduled by the DL control information 1304 transmitted later in time among the two pieces of DL control information, and report a second signal in response to the first signal 1308.
  • the UE may not receive the first signal 1306 scheduled by the DL control information 1302 transmitted earlier in time among the two pieces of DL control information, and may not report (or may drop or ignore, or may report in NACK or in arbitrary value) a second signal in response to the first signal 1308.
  • the UE may only report a second signal in response to the first signal 1308 scheduled by the DL control information 1304 transmitted later in time among the two pieces of DL control information.
  • the UE may not report (or may drop or ignore, or may report in NACK or in arbitrary value) a second signal in response to the first signal 1306 scheduled by the DL control information 1302 transmitted earlier in time among the two pieces of DL control information.
  • the UE may not expect transmission of a second signal in response to the first signal 1306 scheduled by the DL control information 1302 transmitted earlier in time among the two pieces of DL control information.
  • the second signal may be HARQ-ACK information
  • the second signal may be a report value of a channel measurement result for the reference signal
  • Control information for scheduling an eMBB signal or a URLLC signal may be distinguished by DCI formats, RNTIs scrambled in DCI, or scrambling methods performed in generating DCI.
  • the method may distinguish between a URLLC signal and an eMBB signal according to the following equation 9, or may be generally used for indicating traffic with priority.
  • C init n RNTI ⁇ 2 16 + N priority ⁇ 2 x + n Id mod 2 31
  • n RNTI is a value given by a C-RNTI in the UE-specific search space of the PDCCH through a higher signal, and is deemed '0' when there is no corresponding higher signal configuration.
  • N ID has a value among ⁇ 0, 1, ... , 2 16-x ⁇ when there is higher configuration, and is equal to a cell ID to which the UE belongs when there is no higher configuration.
  • the value of x may be additionally configured by a separate higher signal, or determined to be one of the values between 0 to 16 in a standard.
  • N priority denotes a priority related to control information to be scrambled with corresponding c init . Alternatively, it denotes a priority of the traffic scheduled in the control information. The greater or smaller the value is, the higher priority it has.
  • the UE may directly figure out the priority of the control information based on the value of N priority obtained in a descrambling process. This enables the UE to determine which signal is to be ignored or processed, when the first or second signals scheduled in two pieces of control information overlap in a time or frequency resource region.
  • the UE ignores (or drops) the second signal scheduled in the control information scrambled with the value of N priority , 5 and processes only the second signal scheduled in the control information scrambled with the value of N priority , 10.
  • the UE may expect to receive the first signal 1306 scheduled by the DL control information 1302 transmitted earlier in time among the two pieces of DL control information only in a resource region not overlapping in time with the first signal 1308 scheduled by the DL control information 1304 transmitted later.
  • the UE may receive only resource regions corresponding to the fifth symbol, the sixth symbol, and the tenth symbol for the first signal 1306. That is, the UE may receive the two first signals 1306 and 1308 in a time multiplexing scheme (TDM) and may not expect to receive the first signal 1306 in a region overlapping in time with the second first signal 1308.
  • TDM time multiplexing scheme
  • first and second signals are scheduled by DL control information (or L1 signaling)
  • they may be configured by higher signals such as MAC CE or RRC signals without separate L1 DL control information.
  • the first and second signals may be configured by using semi-persistent scheduling (SPS), a periodic CSI process, or the like.
  • SPS semi-persistent scheduling
  • the aforementioned operation may be applied only to a UE that is unable to receive two or more pieces of first signal information requiring second signals in a particular OFDM symbol.
  • FIG. 14 illustrates a situation where second signals are overlapped.
  • a BS schedules a resource 1406 for a first signal and a resource 1410 for a second signal with first DL control information 1402, and then schedules a resource 1408 for a first signal and a resource 1412 for a second signal with second DL control information 1404.
  • the resources 1410 and 1412 for the second signals are shown as being overlapped in at least one OFDM symbol.
  • the overlapping second signals may usually be transmitted in the resource 1412 scheduled in the second DL control information 1404 finally scheduled later. In other words, this is a UL control information multiplexing scheme.
  • the second signal for the URLLC related signal may have higher priority than the second signal for the eMBB related signal.
  • UL control information not including the second signal for the eMBB related signal but including only the second signal for the URLLC related signal may be transmitted in the resource 1412 scheduled in the second DL control information 1404. In other words, it may be expected that the UE does not transmit (or drop) the second signal for the eMBB related signal and the scheduled resource 1410.
  • the second signal for the eMBB related signal is HARQ-ACK information
  • the BS may separately receive a second signal that has not been transmitted without retransmitting the first signal 1406 for eMBB in the following methods:
  • the UE may receive DL control information indicating the same HARQ process number as a PDSCH corresponding to the HARQ-ACK, and when the DL control information has a particular MCS value or a resource allocation value (or a combination thereof), the UE may determine that the DL control information is control information indicating only transmission of the HARQ-ACK that has been dropped before. For example, in a case that the UE has received a PDSCH corresponding to HARQ process No. 1 and dropped transmission of the corresponding HARQ-ACK due to the aforementioned situation, when subsequently received DL control information indicates the HARQ-ACK process No.
  • the UE may determine that the DL control information indicates transmission of the previously dropped HARQ-ACK. In this case, the UE may transmit the dropped HARQ-ACK information in a PUCCH resource region indicated in the DL control information without actually receiving DL data information.
  • a unit of N in the above formula is an OFDM symbol unit.
  • first and second signals are scheduled by DL control information (or L1 signaling)
  • they may be configured by higher signals such as MAC CE or RRC signals without separate L1 DL control information.
  • the first and second signals may be configured by using semi-persistent scheduling (SPS), a periodic CSI process, or the like.
  • SPS semi-persistent scheduling
  • the aforementioned operation may be applied only to a UE that is unable to receive two or more pieces of first signal information requiring second signals in a particular OFDM symbol.
  • FIG. 15 is a diagram for describing operation of a UE, according to an embodiment.
  • the UE transmits a second signal 1504 corresponding to a received first signal 1502 and transmits a second signal 1508 corresponding to another received first signal 1506 in a cell and in a BWP.
  • the first signals may be PDSCHs or PDCCHs
  • the second signals may be PUCCHs or PUSCHs including HARQ-ACK information for the PDSCH, or PUSCHs including UL data information for UL grant (the PDCCH).
  • the second signals may be physical random access channels (PRACHs) or sound reference signals (SRSs) and the first signals may be channel state information reference signals (CSI-RSs).
  • PRACHs physical random access channels
  • SRSs sound reference signals
  • CSI-RSs channel state information reference signals
  • Processing time A required by the UE to transmit the second signal 1504 corresponding to the received first signal 1502 and processing time B required by the UE to transmit the second signal 1508 corresponding to the other received first signal 1506 may be the same or may be different. Alternatively, in a situation where the two processes are out of order as in FIG. 15 , the processing time A may be generally equal to or greater than the processing time B. Processing time is divided largely into PDSCH processing time of the UE for HARQ-ACK reporting and PUSCH processing time of the UE for PUSCH transmission for UL grant.
  • the PDSCH processing time of the UE for HARQ-ACK reporting may have values in Table 3 or Table 4, and the processing values in Table 4 may be generally smaller than those in Table 3.
  • the PUSCH processing time of the UE for UL grant may have values in Table 5 or Table 6, and the processing values in Table 6 may be generally smaller than those in Table 5.
  • Table 3 and Table 5 may be called processing time capability 1
  • Table 4 and Table 6 may be called processing time capability 2.
  • the UE may report whether to support the out-of-order scheduling as shown in FIG. 15 through a UE capability report in advance. In a case of supporting the out-of-order scheduling, it is also possible to add whether to process all or only one of the two second signals scheduled out of order to the UE capability report.
  • the following methods are UE capability message types available for out-of-order support, and the UE may report at least one of the following UE capability messages to the BS.
  • the BS receives a report of multiple UE capabilities from a UE, the BS may indicate one of them to the UE in a higher signal. Apart from the higher signal, it is also possible to adaptively indicate it to the UE in an L1 signal.
  • Types of the L1 signal may include a downlink control information (DCI) format, a radio network temporary identifier, a DCI field, control resource set (CORESET) configuration, search space configuration, etc.
  • Types of the higher signal refer to signals delivered to an MAC layer, an RRC layer, etc., apart from the signal delivered to a PHY layer.
  • a UE **BS??** may regard the UE as a UE that does not support out-of-order scheduling, and may not perform the out-of-order scheduling for the UE.
  • Out_of_order_both is a UE capability reported by the UE to the BS, and is information indicating that the UE is able to transmit all the second signals for the first signals scheduled out of order. Specifically, when the UE receives out_of_order_both related higher signal configuration from the BS after reporting the out_of_order_both to the BS, the UE may expect that the subsequently scheduled control and data information becomes out of order. When the out_of_order_both related higher signal configuration is not received, the control and data information may not be scheduled out of order. Alternatively, the aforementioned UE operation may be provided by reporting a UE capability, which is out_of_order_both, without the out_of_order_both related higher signal. When there is no such a UE capability report, the BS may determine to perform at least one of the following three detailed operations.
  • the aforementioned operations may be defined in one in a standard, or it is possible that one of a higher signal or an L1 signal may indicate a certain detailed operation.
  • Out of order second is a UE capability reported by the UE to the BS.
  • the UE may first process only the second signal 1504 scheduled later among the second signals corresponding to the first signals scheduled out of order, and may drop (or skip) the second signal 1508 scheduled earlier or leave it at the UE's discretion without having a separate definition of the UE operation.
  • Out of order condition is a UE capability reported by the UE to the BS.
  • out_of_order_condition is a field to report a processing capability of the UE by determining whether to process all the second signals scheduled out of order or process only the second signal scheduled later among the second signals scheduled out of order according to a particular condition.
  • the out_of_order_condition is configured by a higher signal, the UE drops (or skips) the second signal 1504 scheduled earlier among the second signals scheduled out of order and processes the second signal 1508 scheduled later, when at least one of the following conditions is met.
  • the UE processes all the second signals 1504 and 1508 scheduled out of order, when one of the following conditions is not met.
  • the UE may consider only some of the following conditions. For example, the UE may consider only condition a-1 to be out_of_order_condition.
  • UE capability parameters are just examples, and may be fully replaced with different terms. Furthermore, without the presence of a UE capability, UE capability based UE operations may be reflected by BS settings or default.
  • the aforementioned processing value determination or the minimum processing value is a minimum processing time required by the UE to process the second signal in response to reception of the first signal as described above, and when the BS schedules the first signal and the second signal having a value smaller than the time, the UE may or may not process the second signal. Accordingly, only when the BS schedules the first signal and the second signal having values at least greater than the time, the UE may perform an operation expected by the BS.
  • the UE does not encounter a situation where the processing value B for the second signal 1508 corresponding to the first signal 1506 is greater than the processing value A for the second signal 1504 corresponding to the first signal 1502.
  • the UE is not scheduled with a situation where the processing value A is capability 2 having a smaller processing value as in Table 4 or Table 6 and the processing value B is capability 2 having a larger processing value as in Table 3 or Table 5.
  • the UE regards such a case of being out-of-order scheduling as an error case.
  • the UE it is possible for the UE to report a UE capability related to the out-of-order scheduling to the BS.
  • the BS configures the out-of-order scheduling in a higher signal, and after that, the UE is able to receive the out-of-order scheduling as in FIG. B ** 15??
  • the higher signal may be divided into an out-of-order higher signal for PDSCH to HARQ-ACK and an out-of-order higher signal for PDCCH to PUSCH.
  • the UE is not configured with the higher signal related to the out-of-order scheduling from the BS or does not report the out-of-order UE capability to the BS, the UE is unable to receive the out-of-order scheduling.
  • the UE may regard this as an error case and may or may not process the second signals 1504 and 1508 corresponding to the first signals 1502 and 1506 scheduled out of order.
  • the UE may determine whether to adaptively process all the second signals corresponding to the first signals or process only the second signal scheduled later based on conditions a-1 to a-6 under the out_of_order_condition.
  • the UE when the UE receives a multiple cell configuration, the UE may perform out-of-order scheduling of FIG. 15 between different cells. Such determination may also be determined by the UE capability, and whether to perform or to not perform the out-of-order scheduling only in the same cell or whether to perform or to not perform the out-of-order scheduling in the entire cells may be determined by the UE capability.
  • FIG. 16 is a diagram for describing operation of a UE, according to another embodiment.
  • 1600 illustrates a situation where first signals 1602 and 1604 such as PDSCHs or the second signals 1602 and 1604 such as PUSCHs are scheduled to at least partially overlap in time but not to overlap in frequency.
  • 1610 shows a situation where first signals 1612 and 1614 or the second signals 1612 and 6114 are scheduled to partially overlap in time and frequency resources. For example, this may correspond to a case that a DCI format supporting eMBB scheduling schedules the first signals 1602 and 1612, and subsequently, another DCI format supporting URLLC scheduling schedules the first signals 1604 and 1614.
  • the UE may report a UE capability of being able to simultaneously receive multiple first signals to the BS, and may perform at least one of the following operations when the BS sends down a higher signal configuration that allows simultaneous reception.
  • the UE When the UE does not report a UE capability of being able to simultaneously receive multiple first signals to the BS, at least one of the following operations may be possible.
  • a control information configuration value related to transmitting DCI such as a particular DCI format, a CORESET, an RNTI, or the like.
  • the UE may not expect that DCI 2 having the same DCI format A schedules 1604 (or 1614).
  • DCI 1 having DCI format A schedules 1602 (or 1612) the UE may expect that DCI 2 having different DCI format B schedules 1604 (or 1614).
  • DCI 1 having DCI format A schedules 1602 (or 1612)
  • DCI 2 having the same DCI format is not accepted, but DCI 2 having a different DCI format may schedule 1604 (or 1614).
  • 1602 (or 1612) is scheduled by DCI 1 detected in CORESET A (or search space A)
  • scheduling 1604 (or 1614) is accepted not through DCI 2 detected in the same CORESET A (or search space A) but through DCI 2 detected in different CORESET B (or search space B).
  • scheduling 1604 (or 1614) is accepted not in different DCI 2 including CRC scrambled by the same RNTI A but in DCI 2 including CRC scrambled by different RNTI B.
  • the aforementioned embodiments were described on the assumption that 1600 and 1610 of FIG.
  • DCI 16 are accepted for different CORESETs, different DCI formats, different search spaces, and different RNTIs, but when priorities are set between the CORESETs, the DCI formats, the search spaces, or RNTIs, DCI based on a CORESET, a DCI format, a search space, or an RNTI having higher priority may be the DCI 2 and DCI based on a CORESET, a DCI format, a search space, or an RNTI having lower priority may be the DCI 1. Setting the priorities may be separately specified in a standard, or priority values may also be determined by higher signal configuration. In an example of specifying the priority in the standard, for the RNTIs, an MCS-RNTI is always given higher priority than a C-RNTI.
  • priority information is included and the BS may explicitly designate priority values in configuring the CORESET, the DCI format, or the search space.
  • the UE may report NACK for a corresponding HARQ-ACK resource, or may report information from a PHY layer to a higher layer that reception of a transport block transmitted on the PDSCH 1602 or the PDSCH 1612 has failed.
  • Such an operation may be applied to a case that the UE is configured with transport block (TB) based retransmission, or to a case that the PDSCH 1602 and the PDSCH 1612 is scheduled in TB based retransmission.
  • TB transport block
  • the UE when the UE is configured with code block group (CBG) retransmission in a higher signal in 1600 and 1610, the UE may report HARQ-ACK information for each CBG without an extra mandated operation for the scheduled PDSCH 1602 and PDSCH 1612.
  • CBG code block group
  • the UE transmits the HARQ-ACK information in the PUSCH when piggyback is enabled by higher signal configuration, and the UE drops the PUSCH transmission and transmits only the HARQ-ACK information in a PUCCH when piggyback is disabled.
  • the UE when HARQ-ACK information corresponding to the secondly scheduled PDSCH 1604 and PDSCH 1614 overlaps a PUSCH only in 1600 and 1610 without higher signal configuration, the UE always drops the PUSCH transmission and transmits the HARQ-ACK information on a PUCCH.
  • FIG. 17 is a block diagram illustrating an internal structure of a UE, according to an embodiment.
  • a UE may include a transceiver 1710, a memory 1720, and a processor 1730.
  • the transceiver 1710, the memory 1720, and the processor 1730 of the UE may operate according to the aforementioned communication method of the UE. Components of the UE are not, however, limited thereto. For example, the UE may include more or fewer elements than described above.
  • the transceiver 1710, the memory 1720, and the processor 1730 may be implemented in a single chip.
  • the transceiver 1710 may transmit or receive signals to or from the BS.
  • the signals may include control information and data.
  • the transceiver 1710 may include an RF transmitter for up-converting the frequency of a signal to be transmitted and amplifying the signal and an RF receiver for low-noise amplifying a received signal and down-converting the frequency of the received signal. It is merely an example of the transceiver 1710, and the elements of the transceiver 1710 are not limited to the RF transmitter and RF receiver.
  • the transceiver 1710 may receive a signal on a wireless channel and output the signal to the processor 1730, or transmit a signal output from the processor 1730 on a wireless channel.
  • the memory 1720 may store a program and data required for operation of the BS. Furthermore, the memory 1720 may store control information or data included in a signal obtained by the UE.
  • the memory 1720 may include a storage medium such as a read only memory (ROM), a random access memory (RAM), a hard disk, a compact disc ROM (CD-ROM), and a digital versatile disc (DVD), or a combination of storage mediums.
  • ROM read only memory
  • RAM random access memory
  • CD-ROM compact disc ROM
  • DVD digital versatile disc
  • the processor 1730 may control a series of processes for the UE to be operated according to the embodiments.
  • the processor 1730 may control to receive a first signal from a BS, determine whether an out-of-order HARQ occurs, determine a transmission time of a second signal in response to the first signal by considering an out-of-order HARQ when the out-of-order HARQ occurs, and transmit the second signal at the determined transmission time.
  • FIG. 18 is a block diagram illustrating the structure of a BS, according to an embodiment.
  • a BS may include a transceiver 1810, a memory 1820, and a processor 1830.
  • the transceiver 1810, the memory 1820, and the processor 1830 of the BS may operate according to the aforementioned communication method of the BS.
  • Components of the BS are not, however, limited thereto.
  • the BS may include more or fewer elements than described above.
  • the transceiver 1810, the memory 1820, and the processor 1830 may be implemented in a single chip.
  • the transceiver 1810 may transmit or receive signals to or from a UE.
  • the signals may include control information and data.
  • the transceiver 1810 may include an RF transmitter for up-converting the frequency of a signal to be transmitted and amplifying the signal and an RF receiver for low-noise amplifying a received signal and down-converting the frequency of the received signal. It is merely an example of the transceiver 1810, and the elements of the transceiver 1810 are not limited to the RF transmitter and RF receiver.
  • the transceiver 1810 may receive a signal on a wireless channel and output the signal to the processor 1830, or transmit a signal output from the processor 1830 on a wireless channel.
  • the memory 1820 may store a program and data required for an operation of the BS. Furthermore, the memory 1820 may store control information or data included in a signal obtained by the BS.
  • the memory 1820 may include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage mediums.
  • the processor 1830 may control a series of processes for the BS to be operated according to the embodiments of the disclosure.
  • a computer-readable storage medium storing one or more programs (software modules) may be provided.
  • the one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors in an electronic device.
  • the one or more programs may include instructions that cause the electronic device to perform the methods in accordance with the claims of the disclosure or the embodiments described in the specification.
  • the programs may be stored in a random access memory (RAM), a non-volatile memory including a flash memory, a read only memory (ROM), an electrically erasable programmable ROM (EEPROM), a magnetic disc storage device, a compact disc-ROM (CD-ROM), a digital versatile disc (DVD) or other types of optical storage device, and/or a magnetic cassette.
  • RAM random access memory
  • ROM read only memory
  • EEPROM electrically erasable programmable ROM
  • magnetic disc storage device a compact disc-ROM (CD-ROM), a digital versatile disc (DVD) or other types of optical storage device, and/or a magnetic cassette.
  • CD-ROM compact disc-ROM
  • DVD digital versatile disc
  • the programs may be stored in a memory including a combination of some or all of them. There may be a plurality of memories.
  • the program may also be stored in an attachable storage device that may be accessed over a communication network including the Internet, an intranet, a LAN, a wide LAN (WLAN), or a storage area network (SAN), or a combination thereof.
  • the storage device may be connected to an apparatus performing the embodiments of the disclosure through an external port.
  • a separate storage device in the communication network may be connected to the apparatus performing the embodiments of the disclosure.
  • a component is represented in a singular or plural form. It should be understood, however, that the singular or plural representations are selected appropriately according to the situations presented for convenience of explanation, and the disclosure is not limited to the singular or plural form of the component. Further, the component expressed in the plural form may also imply the singular form, and vice versa.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
EP19842261.0A 2018-07-27 2019-07-26 Verfahren und vorrichtung zur bestimmung der übertragungszeit in einem drahtloskommunikationssystem Pending EP3823193A4 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20180088158 2018-07-27
KR1020190005382A KR20200012702A (ko) 2018-07-27 2019-01-15 무선 통신 시스템에서 전송 시간 결정 방법 및 장치
KR1020190055169A KR20200012716A (ko) 2018-07-27 2019-05-10 무선 통신 시스템에서 전송 시간 결정 방법 및 장치
PCT/KR2019/009363 WO2020022850A1 (ko) 2018-07-27 2019-07-26 무선 통신 시스템에서 전송 시간 결정 방법 및 장치

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EP3823193A4 EP3823193A4 (de) 2021-08-25

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EP (1) EP3823193A4 (de)
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CN110831200B (zh) * 2018-08-07 2023-09-01 财团法人资讯工业策进会 用于移动通信系统的用户装置及基站
US11424868B2 (en) * 2019-01-24 2022-08-23 Mediatek Singapore Pte. Ltd. Method and apparatus for user equipment processing timeline enhancement in mobile communications
US20210105217A1 (en) * 2019-10-03 2021-04-08 Samsung Electronics Co., Ltd System and method for a user equipment to process overlapping physical downlink shared channels
US11924827B2 (en) * 2020-02-21 2024-03-05 Qualcomm Incorporated UE processing time for PDSCH repetition in the same slot
WO2023133742A1 (zh) * 2022-01-12 2023-07-20 北京小米移动软件有限公司 物理下行共享信道的处理时间参数的确定方法及装置

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WO2013147490A1 (ko) * 2012-03-26 2013-10-03 엘지전자 주식회사 무선 통신 시스템에서 무선 자원의 동적 자원 변경을 위한 harq 수행 방법 및 이를 위한 장치
EP2874371B1 (de) 2012-08-17 2018-04-18 Huawei Technologies Co., Ltd. Datenpaketübertragungsverfahren und vorrichtung
US10355828B2 (en) 2015-03-02 2019-07-16 Qualcomm Incorporated Fast radio link control error recovery with low latency transmissions
US9929834B2 (en) 2015-04-28 2018-03-27 Qualcomm Incorporated Low latency operation with different hybrid automatic repeat request (HARQ) timing options
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CN110149174B (zh) * 2018-02-13 2021-02-12 华为技术有限公司 无线通信方法、网络设备、终端设备及可读存储介质

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US11973605B2 (en) 2024-04-30
KR20200012702A (ko) 2020-02-05
CN112740589B (zh) 2024-05-28
KR20200012716A (ko) 2020-02-05
CN112740589A (zh) 2021-04-30
EP3823193A4 (de) 2021-08-25

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